Please use this identifier to cite or link to this item:
|Title:||Exchange coupled CoPt/FePtC media for heat assisted magnetic recording||Authors:||Dutta, Tanmay
Piramanayagam, S. N.
Ru, Tan Hui
Saifullah, M. S. M.
Bhatia, C. S.
|Issue Date:||2018||Source:||Dutta, T., Piramanayagam, S. N., Ru, T. H., Saifullah, M. S. M., Bhatia, C. S., & Yang, H. (2018). Exchange coupled CoPt/FePtC media for heat assisted magnetic recording. Applied Physics Letters, 112(14), 142411-. doi:10.1063/1.5012815||Series/Report no.:||Applied Physics Letters||Abstract:||L10 FePtC granular media are being studied as potential future magnetic recording media and are set to be used in conjunction with heat assisted magnetic recording (HAMR) to enable recording at write fields within the range of current day recording heads. Media structures based on a FePtC storage layer and a capping layer can alleviate the switching field distribution (SFD) requirements of HAMR and reduce the noise originating from the writing process. However, the current designs suffer from SFD issues due to high temperature writing. To overcome this problem, we study a CoPt/FePtC exchange coupled composite structure, where FePtC serves as the storage layer and CoPt (with higher Curie temperature, Tc) as the capping layer. CoPt remains ferromagnetic at near Tc of FePtC. Consequently, the counter exchange energy from CoPt would reduce the noise resulting from the adjacent grain interactions during the writing process. CoPt/FePtC bilayer samples with different thicknesses of CoPt were investigated. Our studies found that CoPt forms a continuous layer at a thickness of 6 nm and leads to considerable reduction in the saturation field and its distribution.||URI:||https://hdl.handle.net/10356/82979
|ISSN:||0003-6951||DOI:||10.1063/1.5012815||Rights:||© 2018 The Author(s). All rights reserved. This paper was published by AIP in Applied Physics Letters and is made available with permission of The Author(s).||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
Files in This Item:
|Exchange coupled CoPt_FePtC media for heat assisted magnetic recording.pdf||2.19 MB||Adobe PDF|
Updated on Sep 1, 2020
Updated on Mar 10, 2021
Updated on Jul 17, 2021
Updated on Jul 17, 2021
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.